Miter-box.



No. 667,957. Patented Feb. I2, I90l. J. H. MATSUN.

MITER BOX.

(Agplication flied Nov. 15, 1900) (No Model.) 2 Sheets$heet l.

No. 667,9. Patented Feb. 12, I90I.

J. H. MATSON.

MITER BOX.

(Application filed Nov. 15, 1900.) (No Model.) 2 Sheets-Sheet 2.

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JOHN H. MATSON, OF HARTFORD, CONNECTICUT.

lVlllTEl-l BOX.

SPECIFICATION formingpart of Letters Patent No. 667,917, dated February12, 1901. Application filed November 15,1900. Serial No. 86,596. (Nomodel.)

.To aZZ when t it may concern:

Be it known that 1, JOHN H. MATSON, of the city and county of Hartford,in the State of Connecticut, have invented certain new and usefulImprovements in Miter-Boxes, which improvements are described in thefollowing specification and are illustrated by the accompanyingdrawings.

My invention relates to that class of miterboxes in which the saw-guidesare adjustable according to the required angular direction of the kerf.Its-object is to facilitate in such a box the necessary adjustments ofthe sawguides and to provide for special adjustments of the stock thatis to be sawed. As respects the saw-guides, this object of my inventionis accomplished by means of a horizontal pivoted lever, upon which theyare mounted. As respects the molding or other stock which is to be cut,special adjustments thereof are facilitated by means of adjustablefence-posts, which may be advanced upon the face of the bed through anynecessary angle, and as respects both the sawguides and the stoclr thenecessary adjustments are aided by a pivoted index-finger, which isadapted to receive, through intermediate mechanism, twice the angularmovements of the pivoted lever and of the sliding posts severally, andhence to register at every adjustment of the box the entire angle atwhich the pieces of stock to be sawed offdnring that adjustment wouldunite in a miterjoint.

The best mode in which I have contemplated applying the principles of myinvention is exhibited in said drawings, wherein- Figure 1 is aperspective View of a miterbox constructed in accordance with thoseprinciples and holding a miter-saw in a working position. Fig. 2 is arear elevation, and Fig. 3 is a plan, of the same box. Fig. 4: is anenlarged part of Fig. 2.

In the views the numeral 1 denotes the flat bed of the box. This bed,which is supported in a horizontal position by feet 2, 3, 4:, and 5, mayadvantageously be made of iron or steel, with a thin wooden covering forthe protection of the saw-teeth.

The n umeral (i denotes the fence,which rises perpendicularly from theback edge of bed 1 and is divided in the middle by a vertical slot 7 forthe accommodation of said saw 8. The latter is held in working positionsby a sawframe consisting of two vertical split guides 9 and 10 and ahorizontal lever 11, on which thoseguidesarecarricd. 'lhisleverispivoted to the underside of bed 1 by pin 12 at a point in the plane ofthe face of fence 6, all in the usual manner, as shown in Figs. 1 and 3.()n the same pin 12and below bed 1, as shown in Figs. 2 and 3, acog-wheel 13 is fastened toleverll. Projecting slightly from the underside of bed l are catches 15 and 90, which are respectively adapted toengage said lever ll whenever that pivoted member is turned on itspivot, so as to form an angle of forty-five degrees or ninety degreeswith the plane of fence 6. To the back side of fence 6 there is pivoteda second cog-wheel 14, carrying an index-linger 15, which is adapted totraverse a graduated are 16. (Shown in Figs. 2 and 4.) Motion fromcog-wheel 13 is communicable to cogwheel lat by an intermediate slidingrack, which consists of two separable parts 17 and 18. (Shown in Figs. 2and 4.) These two parts, which engage said cog-wheels, respectively, areunited, when necessary, by a removable pin 19, which is shown in Fig. 3.For that purpose this pin may be inserted in both said rack members in ahole 20, which 7 is shown in Figs. 2 and 1. The rack member 18 may beclamped in any desired position of adjustment by screw 32. The describedgearing is multiplicative in such sense that the turning of lever 11through any pivotal angle when rack members 17 will cause a deflectionof indexfinger 15 through twice that angle. The theoretical zeroposition of lever 11 isin the plane of the face of fence 6, and thecorresponding zero position of linger 15 is vertically upright, so thatwhen lever 11 is brought to an angle of ninety degrees from zero, asshown in Fig. 3, the index-finger 15 is brought to a position onehundred and eighty degrees from zero, as shown in Fig. 4. On the back offence 6 is fastened a straight vertical strip 21, which crosses thecenter and zenith of the graduated are 16. A second slide 23, which isvisible to a greater or less extent in each of the drawings, isadaptedto be united with the rack member 17 by means of the same pin 19,which purpose be inserted in pin-hole may for that and 18 are so united22 of said rack member and in eitherof the pin-holes 33 in said slide.At the ends of fence 6'are two vertical posts 24and 25, which areadapted to form parts or continuations of that fence and are mounted,respectively,

upon the horizontal curved slides 26 and 27. which are held in theirrespec-' These slides, tive orbits by guides 30 or clamped in positiontherein by set-screws ferior cam-groove 28 (shown in broken lines inFig. 3) and adapted to accommodate apin 29, which sticks up from slide23. The centers of the curvature, and hence of the possible orbitalmotion of the cam-slides 26 and 27, are located, respectively, in thevertical lines which are next to slot 7 in the face of fence 6, and thecurvature of the cam-grooves 28 is such that any angular movement ofeither of those slides about its said center may communicate to finger15 through slide 23 and sliding rack member 17, united by pin 29, anangular movement of twice as many degrees.

Such being the construction of myim proved miter-box, its mode of useand operation remains to be described in two cases-first,wh en the stockis to be cut off at an angle of not less than forty-five degrees, thatbeing the least convenient angle of inclination of lever 11 to the planeof fence 6, and, second, when the stock is to be cut off at an angle ofless than forty-five degrees. In the first case the rack-members 17 and13 being fastened together by pin 19, a bevel having its arms set at anangle equal to that of the proposed miterjoint is placed with one of itsarms evenly against the side of strip 21 and with its other arm inposition to be met by finger 15. Then lever 11, starting, it may be,from its ninetydegree position, (shown in Fig. 3,) is swung by hand tosuch a position that finger 15 is brought up evenly against the otherarm of the bevel. The strip 21 and the finger 15 then form with eachother the angle of the required miter-joint, or alternatively, Withoutthe use of the bevel, the same adjustment may be produced by turninglever 11 in such a manner as to bring finger 15 to the described angularposition, determined by observation of the graduated scale 16. Wheneverby either method finger 15 and strip 21 form with each other the angleof the proposed miter-joint, the sawframe will be in position for thecutting of the stock at one-half that anglenamely, the angle at whichthe same must be cut to form that joint. The saw may then be locked inthe same angular position by the set-screw 31, have each an in-v 2,acting upon slide 18. In the second case lever 11 being turned to itsforty-five-degree position and held there by catch 45 and finger 15being held accordingly in a horizontal position, the rack member 17 alsoand the plain slide 23 being united by the same pin 19, withdrawn frompin-holes 20 and inserted in pin-holes 22 and 23 for that purpose, thefence-post 24 or 25, toward which lever 11 is deflected, is advanced byhand upon bed 1, as shown in Fig. 1. By this movement indexfinger 15,being actuated by cam-slide 27.

through cam-groove 28, pin 29, slide 23, and rack member 17, is soturned before the face of the graduated arc 16 as to form, with strip21, an angle equal, as before, to the. angle at which the arms of therequired miter-joint are to be united. By screw 31 the parts are thenclamped in the desired position. The stock, being laid against the faceof the advanced fence-post and against the near edge of slot 7, willthen be in position to be cut at the requisite angle by the saw so setin its position of deflection of forty-five degrees, as above described.

Such being the construction and operation of my invention, I claim- 1.In a miter-box, a pivoted saw-frame and a separately-pivotedindex-finger, in combination with multiplying-gear for actuating theindex-finger from the saw-frame, substantially as and for the purposespecified.

2. In a miter-box',a sliding fence-post, and a pivoted index-finger, incombination with mechanism for actuating the index-finger from thefence-post, substantially as and for the purpose specified.

3. In a miter-box, a pivoted saw-frame, a pivoted index-finger, and apair of sliding fence-posts, in combination with mechanism for actuatingsuch index-finger from the sawframe and from the fence-posts,substantially as and for the purpose specified.

4. In a miter-box, a bed, a slotted fence, a pivoted saw-frame, and apivoted index-finger, in combination with a sliding fence-post, andmechanism for actuating the index-finger from the saw-frame and from thefencepost, substantially as and for the purpose specified.

In testimony whereof I hereunto set my name in the presence of twowitnesses.

JOHN H. MATSON.

Witnesses:

WILLARD EDDY, CHARLES EDDY.

